#42 Inline comment documentation

[Larry Jones]

The documentation for the implicitvarcmd inline comment should mention that "var" can be either a simple variable name or a list containing a variable name and optional type as in the variable inline comment. In my case, I have some implicit variables with spaces in the names and it took me a while to figure out that I had to have two sets of braces around them since nagelfar was interpreting them as lists.

You should also add documentation for the implicitvarns, implicitvarns+, implicitvarcmd+, alias, nocover, and cover comments.